Top slab for water treatment chamber



FIG. 1 is a top perspective view showing our new design for a top slab for water treatment chamber,

FIG. 2 is a top view thereof,

FIG. 3 is a bottom view thereof,

FIG. 4 is a left side view thereof,

FIG. 5 is a right side view thereof; and,

FIG. 6 is a front view thereof.

The portions shown in broken lines are for illustrative purposes only, forming no part of the claimed design. 

The ornamental design for a top slab for water treatment chamber, as shown and described. 